No photos in here – Baths are single-sex only, with a separate rooms for "seshin," the Korean method of scrubbing the body all over with sandpaper-like loofahs.

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Maze of rooms and pools – Stays are limited to four (incredibly short) hours.

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Yellow earth – The description for the Hwangto-bang (Yellow Earth Room) reads: "It's been said that yellow earth is a good remedy to women's disease and has a good effect in purification and mental stability. As it emits far-infrared rays, customers who want to take rest are recommended to use this room."

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Salt room – Made of bricks of salt, the salt room is said to be good for the skin -- then again, there isn't a room in the spa that doesn't come with that claim.

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Roman bath – Spa Land is big on themed rooms.

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Pyramid room – The walls of the pyramid room are set at a 52-degree angle, "which has been said to be the easiest angle to collect energies from the universe," according to the spa.

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Walls of pyramid room are set at a 52-degree angle to "collect energies from the universe"

(CNN)Here's a tip for traveling in Busan: whatever time you've allotted for a venue or attraction, triple it.

No, quadruple it.

Everything in South Korea's second largest city (after Seoul) is better than you think it's going to be, and you'll want more time to explore and enjoy.

Case in point is Spa Land Centum City, a gigantic, modern jjimjilbang (Korean-style sauna/spa) located inside Shinsegae Department Store Centum City, reportedly the world's largest department store, which opened four years ago.

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Before seeing Spa Land, I had set aside an hour for a visit -- the usual amount of time I allot for soaking and scrubbing at a Korean bathhouse.

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Coming from Seoul, I was skeptical about how different one jjimjilbang could be from any other. The capital, after all, is well known for its extravagant spas.

Boy, was I mistaken.

A spa like no other

Centum City's Spa Land takes the jjimjilbang concept to an entirely new place.

While Seoul jjimjilbangs tend to be mobbed 24 hours a day with families and groups of friends, Spa Land presents a more refined, upscale and leisurely experience.

Despite state-of-the-art facilities, admission fees are reasonable -- ₩12,000 ($10.50) on weekdays and ₩14,000 ($12.25) on weekends. Students get a slight discount and -- here's an interesting kicker -- children under 13 aren't allowed inside, an unheard of concept in Korea, where families often make weekend rituals of jjimjilbang visits.

Another unusual feature is the four-hour limit on stays.

Most Korean jjimjilbangs are open 24 hours and often serve as a crash pad for over-indulgent partiers, many of whom prefer to sleep off the effects of the night in a spa rather than face the repercussions of coming home late and smelling like the inside of a brewery vat.

How to do Spa Land right

The first thing Koreans want to know about a jjimjilbang is whether the water is special enough to bathe in.

The water in Spa Land's baths and pools is pumped from two types of hot springs that lie 100 meters underground, and which are sterilized 36 times a day.

The "sodium bicarbonate hot spring" is the "beauty bathtub," said by the spa to "remove your dead skin cells and make your skin and hair shiny."

The "sodium chloride hot spring" is "similar to seawater" and has a "heat-preservation effect" that is "good for blood circulation and helps to relieve pain from neuralgia and backache."

The spa ritual itself is familiar.

Visitors change into cotton shirts and pants handed out at reception. Then they head to communal areas.

There's a tarot card reading station set up near the entrance, but most people beeline past this and head straight for the outdoor foot bath area.

Here there's a large heated pool for wading back and forth, as well as private booths where couples often play games on their phones while perched precariously above pools of water.

Theme rooms

Spa Land has dreamed up a variety of themes for its many steam and sauna rooms.

These range from extremely hot (I couldn't enter this one without yelping in pain) to extremely cold (the Ice Room has a cute, fake jellyfish aquarium) to the gimmicky.

How gimmicky?

The walls of the pyramid room are set at a 52-degree angle, "which has been said to be the easiest angle to collect energies from the universe," according to the spa.